A few weeks ago, new photos were released for Star Wars: The Force Awakens, one of which featured the famous droids R2-D2 and C-3PO. The image confirmed that the latter droid will have a red arm in the film (a feature that was spotted in early merchandising). At the time, everyone wondered why the golden protocol droid had one red arm, but as we all know, director J.J. Abrams keeps his “mystery box” securely closed.

Now, it turns out we will soon find out how C-3PO got that new red arm in Star Wars Special: C-3PO #1, a new one-shot comic book from Marvel that’s part of the Journey to Star Wars: The Force Awakens program that will see 20 new stories in various formats (books, comics, and activity books, and more) leading up to the new movie.